JPH02164230A - Dc power transmission system - Google Patents
Dc power transmission systemInfo
- Publication number
- JPH02164230A JPH02164230A JP63316409A JP31640988A JPH02164230A JP H02164230 A JPH02164230 A JP H02164230A JP 63316409 A JP63316409 A JP 63316409A JP 31640988 A JP31640988 A JP 31640988A JP H02164230 A JPH02164230 A JP H02164230A
- Authority
- JP
- Japan
- Prior art keywords
- self
- generator
- converter
- excited
- excited converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 abstract description 8
- 238000007634 remodeling Methods 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Rectifiers (AREA)
- Control Of Eletrric Generators (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は揚水発電所の出力又は入力に関する送電システ
ムに係り、特に揚水負荷の調整が自由にできる自励式直
流送電システムに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a power transmission system related to the output or input of a pumped storage power plant, and particularly to a self-excited DC power transmission system in which pumped storage load can be freely adjusted.
従来の揚水発電所は、同期式発電電動機を備え、交流送
電線により負荷及び他の発電所と連系されている。その
ため特に揚水運転中は、同期電動機として運転されるた
め、揚水量の調整が困難で一定負荷として運用されてき
た。そのため、揚水負荷が増加すると、一般の負荷変動
に追従する調整電源が不足し周波数の変動が大きくなっ
たり、あるいは、系統の安定度が低下するという問題が
生じる。このための対策の１つとして揚水発電機の励磁
電源周波数を変化させて回転数を調整し、揚水量をひい
ては、揚水負荷量を調整する可変速揚水発電システムも
考案されている。しかしこのような可変速揚水発電シス
テムは、励磁回路の変更等、発電機本体の改造が必要と
なる他、本質的には、交流連系であるため、脱調等の安
定度問題から逃れることはできない。Conventional pumped storage power plants include synchronous generator motors and are interconnected with loads and other power plants by AC transmission lines. For this reason, especially during pumping operation, it is operated as a synchronous motor, making it difficult to adjust the amount of pumped water, so it has been operated as a constant load. Therefore, when the pumped storage load increases, there arises a problem that there is a shortage of regulated power supply that can follow general load fluctuations, resulting in increased frequency fluctuations or a decrease in system stability. As one of the countermeasures for this, a variable speed pumped storage power generation system has been devised in which the excitation power frequency of the pumped storage generator is changed to adjust the rotation speed, thereby adjusting the amount of pumped water and, by extension, the amount of pumped storage load. However, such variable speed pumped storage power generation systems require modification of the generator itself, such as changing the excitation circuit, and because they are essentially AC interconnected, it is difficult to avoid stability problems such as step-out. I can't.
尚、この種の装置としては、（電気学会誌、８６３年２
号 １０８巻 第１２７頁 小特集：交流可変速ドライ
ブシステムの高性能 大容量化技術 参照 １部添付）
に掲載されている。In addition, as this type of device, (Journal of the Institute of Electrical Engineers of Japan, 863, 2
No. 108, page 127 Small feature: High-performance, high-capacity technology for AC variable speed drive systems (Reference: 1 copy attached)
Published in.
上記従来技術は、既設設備の有効活用及び安定度問題の
根本解決にはならなかった。The above-mentioned conventional technology has not been able to effectively utilize existing equipment or fundamentally solve the stability problem.
本発明の目的は、既発型設備の大幅な改造を不要とし、
かつ交流系のもつ安定度問題を無くする揚水発電所の連
系送電システムを提供することにある。The purpose of the present invention is to eliminate the need for major modification of existing equipment,
Another object of the present invention is to provide an interconnected power transmission system for pumped storage power plants that eliminates the stability problems of AC systems.
上記目的を達成するには、直流送電システムを適用すれ
ばよいと言われてきた。しかし従来の直流送電システム
の交直変換器は、いわゆる他励式変換器であり、揚水運
転中のように変換器の背後に交流同期電源が存在しない
場合は運転が不可能であった。It has been said that in order to achieve the above objectives, it is sufficient to apply a DC power transmission system. However, the AC/DC converter of the conventional DC power transmission system is a so-called separately excited converter, and cannot be operated when there is no AC synchronous power source behind the converter, such as during pumping operation.
しかし、この他励式変換器の代りに、自励式変換器を設
置し、この変換器の出力周波数を制御することにより、
発電機設備の大きな改造を無くし、かつ、揚水負荷の調
整を可能とし、さらに、対向端変換器を他の電源設備の
近傍に設置すれば、安定度問題も考慮せず安定な揚水発
電所の運用が可能となる。However, by installing a self-excited converter instead of this separately excited converter and controlling the output frequency of this converter,
By eliminating major modifications to generator equipment, making it possible to adjust the pumped storage load, and installing the opposite end converter near other power equipment, it is possible to create a stable pumped storage power plant without considering stability issues. Operation becomes possible.
自励式変換器は、同期電源が無くとも制御装置よりの０
Ｎ−ＯＦＦ指令により強制転流が可能であり、電機子電
源の周波数により回転数を制御できる。すなわち、可変
周波数の自励式変換器と同期発電電動機を組合せれば揚
水運転中も揚水量の制御が可能となる。A self-excited converter can be used without a synchronous power source, even if there is no synchronous power supply.
Forced commutation is possible by the N-OFF command, and the rotation speed can be controlled by the frequency of the armature power supply. That is, by combining a variable frequency self-excited converter and a synchronous generator-motor, it becomes possible to control the amount of pumped water even during pumping operation.
（実施例〕 以下本発明の詳細な説明する。(Example〕 The present invention will be explained in detail below.
第１図は、本発明の実施例のシステム構成図を示す。FIG. 1 shows a system configuration diagram of an embodiment of the present invention.
本システムは、揚水発電所１、発電電動機の回転数を制
御する定周波制御回路７、交流系統６と発電所１を直結
する直流送電線４、そして自励式変換器３．他励式変換
器５により構成される。尚、他励式変換器５は交流を直
流に変換する機能をもてばよいため、自励式変換器でも
構成する事ができる。また直流送電線４は、本システム
の場合きわめて短かい場合は削除する事もできる。This system includes a pumped storage power plant 1, a constant frequency control circuit 7 that controls the rotation speed of the generator motor, a DC transmission line 4 that directly connects the AC system 6 and the power plant 1, and a self-excited converter 3. It is composed of a separately excited converter 5. Note that since the separately excited converter 5 only needs to have the function of converting alternating current to direct current, it can also be configured as a self-exciting converter. Further, in this system, the DC power transmission line 4 can be deleted if it is extremely short.
まず、本システムの起動時、つまり、発電電動機が電動
機として揚水運転を行なう時を説明する。First, a description will be given of the time when this system is started, that is, when the generator motor performs pumping operation as an electric motor.
まず起動時は、変換器５を運転し、直流送電線４を充電
し、自励式変換器３の直流側電圧を定格値とする。次に
低周波に低電圧出力にて自励式変換器３を起動する。こ
の出力電圧により揚水発電所の同期発電機が回転を始め
る。徐々に自励式変換器の周波数及び出力電圧を高くし
、発電機の回転数を上げ、適当なタイミングにて揚水を
開始する。First, at startup, the converter 5 is operated, the DC transmission line 4 is charged, and the DC side voltage of the self-excited converter 3 is set to the rated value. Next, the self-excited converter 3 is activated with a low voltage output at a low frequency. This output voltage causes the pumped storage power plant's synchronous generator to start rotating. Gradually increase the frequency and output voltage of the self-excited converter, increase the rotation speed of the generator, and start pumping water at an appropriate timing.
その後、゛揚水量は、変換電力設定値Ｐ ｔｅｎに応じ
て任意に制御することができる。Thereafter, the amount of pumped water can be arbitrarily controlled according to the converted power set value Pten.
一方、第２図は、発電運転時の本発明の適用例を示した
ものである０発電時は、揚水発電所の水力ガバナ１１で
発電電力は制御される。従って交直変換器３は、この発
電機出力を直流に変換して安定に直流送電線４を介して
交流系へ供給できるよう発電機の回転数が一定となるよ
う制御される。On the other hand, FIG. 2 shows an example of application of the present invention during power generation operation. During zero power generation, the generated power is controlled by the hydraulic governor 11 of the pumped storage power plant. Therefore, the AC/DC converter 3 is controlled so that the rotational speed of the generator is constant so that the output of the generator can be converted into DC and stably supplied to the AC system via the DC transmission line 4.
回転数は、本図では、発電機の回転数計ＰＧにより検出
しているが、他の手段、例えば発電機出力周波数により
検出することでも良い。Although the rotational speed is detected by the rotational speed meter PG of the generator in this figure, it may be detected by other means, such as the generator output frequency.
以上本実施例によれば、発電機部の大幅な改造なしに、
既設の揚水発電所を可変速形に運用でき且つ、直流連系
であるため、交流系との安定度問題を考えずに運用でき
る。As described above, according to this embodiment, without major modification of the generator section,
Existing pumped storage power plants can be operated in a variable speed manner, and because they are connected to the DC system, they can be operated without worrying about stability issues with the AC system.
また、揚水発電所が複数分散配置される場合又は、同一
発電所内に複数台の発電電動機が存在する場合、第３図
に示す様に各々独立に自励式変換器を設置することによ
り、上記実施例と同じ効果が期待できる。又、直流系は
、従来より考案されている直流多端子系統と同様の運用
方式で運転は容易に可能である。In addition, if multiple pumped storage power plants are distributed, or if there are multiple generator motors in the same power plant, the above implementation can be implemented by installing self-excited converters independently for each as shown in Figure 3. You can expect the same effect as the example. Further, the DC system can be easily operated in the same manner as the conventionally devised DC multi-terminal system.
本発明によれば、揚水発電所の発電電動機の大幅な改造
がなし揚水発電時の可変速運転が可能であり、かつ、安
定度問題を考えることなく、安定な揚水発電所の運用が
可能とする効果があるAccording to the present invention, variable speed operation during pumped storage power generation is possible without major modification of the generator motor of the pumped storage power plant, and stable operation of the pumped storage power plant is possible without considering stability issues. has the effect of
第１図は本発明の一実施例として示した揚電所に直結し
た自励式直流送電システムの同第２図は第１図の発電時
の回路図、第３図は明の他の実施例である複数の揚水発
電所のシムを示した図である。Fig. 1 is a self-excited DC power transmission system directly connected to a lifting station shown as an embodiment of the present invention. Fig. 2 is a circuit diagram during power generation in Fig. 1, and Fig. 3 is another embodiment of the present invention. FIG. 2 is a diagram showing shims of a plurality of pumped storage power plants.
Claims (1)
接自励式交直変換器へ接続し、その出力を直流にて負荷
交流電力系統へ直接送電することを特徴とする直流送電
システム。 ２、該直流送電システムに於いて、複数の発電機が設置
されている場合、各発電機毎に自励式交直変換器を１対
１で設置し、直流側で並列接続する多端子を備えた特許
請求の範囲第１項記載の直流送電システム。 ３、上記発電機に於いて揚水運転中は、発電機への入力
電力が設定値に等しくなるよう又、発電運転中は、発電
機の回転数が一定となるよう自励式変換器を制御する揚
水発電所に直結した自励式変換器を有する特許請求の範
囲第１項記載の直流送電システム。[Claims] 1. A pumped storage power plant generator or step-up transformer output section is directly connected to a self-excited AC/DC converter, and the output is directly transmitted as DC to a load AC power system. DC power transmission system. 2. In the case where multiple generators are installed in the DC power transmission system, a self-excited AC/DC converter is installed for each generator in a one-to-one ratio, and equipped with multiple terminals that are connected in parallel on the DC side. A DC power transmission system according to claim 1. 3. During the pumping operation of the above generator, the self-excited converter is controlled so that the input power to the generator is equal to the set value, and during the generation operation, the rotation speed of the generator is constant. The DC power transmission system according to claim 1, comprising a self-excited converter directly connected to a pumped storage power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63316409A JPH02164230A (en) | 1988-12-16 | 1988-12-16 | Dc power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63316409A JPH02164230A (en) | 1988-12-16 | 1988-12-16 | Dc power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02164230A true JPH02164230A (en) | 1990-06-25 |
Family
ID=18076751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63316409A Pending JPH02164230A (en) | 1988-12-16 | 1988-12-16 | Dc power transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02164230A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008187855A (en) * | 2007-01-31 | 2008-08-14 | Toyo Electric Mfg Co Ltd | Output circuit for distributed power supply generator |
| JP2014003848A (en) * | 2012-06-20 | 2014-01-09 | Nakayama Iron Works Ltd | Hydraulic power generating system |
| JP2017200327A (en) * | 2016-04-27 | 2017-11-02 | 株式会社日立製作所 | Multi-terminal power transmission system |
-
1988
- 1988-12-16 JP JP63316409A patent/JPH02164230A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008187855A (en) * | 2007-01-31 | 2008-08-14 | Toyo Electric Mfg Co Ltd | Output circuit for distributed power supply generator |
| JP2014003848A (en) * | 2012-06-20 | 2014-01-09 | Nakayama Iron Works Ltd | Hydraulic power generating system |
| JP2017200327A (en) * | 2016-04-27 | 2017-11-02 | 株式会社日立製作所 | Multi-terminal power transmission system |
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